eric@unterhausen:~/lcncsrc/mesact2/mesact/src$ ./mesact
Traceback (most recent call last):
  File "/home/eric/lcncsrc/mesact2/mesact/src/./mesact", line 26, in <module>
    from libmesact import startup
  File "/home/eric/lcncsrc/mesact2/mesact/src/libmesact/startup.py", line 11, in <module>
    from libmesact import updates
  File "/home/eric/lcncsrc/mesact2/mesact/src/libmesact/updates.py", line 3, in <module>
    from packaging import version
ModuleNotFoundError: No module named 'packaging'